How about investing in a "home Kennel" they are basically cages but with about 4-6 feet of space and has a tray that you can put cat litter or saw dust stuff on it for absorbing and "burying" waste. it also has adjustable shelves where you can set a shelf for bedding. It can be indoor or out door and you can put inside any acceptable chewing materials and toys. they are also adjustable for growth by connecting more than one kennel together. I did this when I had a black lab german shepard mix. it helped big time in potty training and chewing training and so on. when I was home the kennel door stayed open so Bay could go in and out playing and enjoying it and getting a feel for it that, that kennel was his own special area. when I had to leave the house he had no problems with staying in there and playing with his toys and so on. The first week I used treats to get him used to a new item being in the house and his but after that everything went great.